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- /* $Header: /usr/people/sam/tiff/tools/RCS/ppm2tiff.c,v 1.26 1996/04/22 22:03:26 sam Rel $ */
-
- /*
- * Copyright (c) 1991-1996 Sam Leffler
- * Copyright (c) 1991-1996 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
-
- #include "tiffio.h"
-
- #if defined(_WINDOWS) || defined(MSDOS)
- #define BINMODE "b"
- #else
- #define BINMODE
- #endif
-
- #define streq(a,b) (strcmp(a,b) == 0)
- #define strneq(a,b,n) (strncmp(a,b,n) == 0)
-
- static uint16 compression = COMPRESSION_LZW;
- static uint16 predictor = 0;
- static int quality = 75; /* JPEG quality */
- static int jpegcolormode = JPEGCOLORMODE_RGB;
-
- static void usage(void);
- static int processCompressOptions(char*);
-
- static void
- BadPPM(char* file)
- {
- fprintf(stderr, "%s: Not a PPM file.\n", file);
- exit(-2);
- }
-
- int
- main(int argc, char* argv[])
- {
- uint16 photometric;
- uint32 rowsperstrip = (uint32) -1;
- double resolution = -1;
- unsigned char *buf = NULL;
- uint32 row;
- tsize_t linebytes;
- uint16 spp;
- TIFF *out;
- FILE *in;
- uint32 w, h;
- int prec;
- char *infile;
- int c;
- extern int optind;
- extern char* optarg;
-
- while ((c = getopt(argc, argv, "c:r:R:")) != -1)
- switch (c) {
- case 'c': /* compression scheme */
- if (!processCompressOptions(optarg))
- usage();
- break;
- case 'r': /* rows/strip */
- rowsperstrip = atoi(optarg);
- break;
- case 'R': /* resolution */
- resolution = atof(optarg);
- break;
- case '?':
- usage();
- /*NOTREACHED*/
- }
-
- /*
- * If only one file is specified, read input from
- * stdin; otherwise usage is: ppm2tiff input output.
- */
- if (argc - optind > 1) {
- infile = argv[optind++];
- in = fopen(infile, "r" BINMODE);
- if (in == NULL) {
- fprintf(stderr, "%s: Can not open.\n", infile);
- return (-1);
- }
- } else {
- infile = "<stdin>";
- in = stdin;
- }
-
- if (getc(in) != 'P')
- BadPPM(infile);
- switch (getc(in)) {
- case '5': /* it's a PGM file */
- spp = 1;
- photometric = PHOTOMETRIC_MINISBLACK;
- break;
- case '6': /* it's a PPM file */
- spp = 3;
- photometric = PHOTOMETRIC_RGB;
- if (compression == COMPRESSION_JPEG &&
- jpegcolormode == JPEGCOLORMODE_RGB)
- photometric = PHOTOMETRIC_YCBCR;
- break;
- default:
- BadPPM(infile);
- }
- if (fscanf(in, " %ld %ld %d", &w, &h, &prec) != 3)
- BadPPM(infile);
- if (getc(in) != '\n' || w <= 0 || h <= 0 || prec != 255)
- BadPPM(infile);
-
- out = TIFFOpen(argv[optind], "w");
- if (out == NULL)
- return (-4);
- TIFFSetField(out, TIFFTAG_IMAGEWIDTH, w);
- TIFFSetField(out, TIFFTAG_IMAGELENGTH, h);
- TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
- TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, spp);
- TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
- TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
- TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
- TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
- switch (compression) {
- case COMPRESSION_JPEG:
- TIFFSetField(out, TIFFTAG_JPEGQUALITY, quality);
- TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, jpegcolormode);
- break;
- case COMPRESSION_LZW:
- case COMPRESSION_DEFLATE:
- if (predictor != 0)
- TIFFSetField(out, TIFFTAG_PREDICTOR, predictor);
- break;
- }
- linebytes = spp * w;
- if (TIFFScanlineSize(out) > linebytes)
- buf = (unsigned char *)_TIFFmalloc(linebytes);
- else
- buf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(out));
- TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
- TIFFDefaultStripSize(out, rowsperstrip));
- if (resolution > 0) {
- TIFFSetField(out, TIFFTAG_XRESOLUTION, resolution);
- TIFFSetField(out, TIFFTAG_YRESOLUTION, resolution);
- TIFFSetField(out, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
- }
- for (row = 0; row < h; row++) {
- if (fread(buf, linebytes, 1, in) != 1) {
- fprintf(stderr, "%s: scanline %lu: Read error.\n",
- infile, (unsigned long) row);
- break;
- }
- if (TIFFWriteScanline(out, buf, row, 0) < 0)
- break;
- }
- (void) TIFFClose(out);
- if (buf)
- _TIFFfree(buf);
- return (0);
- }
-
- static int
- processCompressOptions(char* opt)
- {
- if (streq(opt, "none"))
- compression = COMPRESSION_NONE;
- else if (streq(opt, "packbits"))
- compression = COMPRESSION_PACKBITS;
- else if (strneq(opt, "jpeg", 4)) {
- char* cp = strchr(opt, ':');
- if (cp && isdigit(cp[1]))
- quality = atoi(cp+1);
- if (cp && strchr(cp, 'r'))
- jpegcolormode = JPEGCOLORMODE_RAW;
- compression = COMPRESSION_JPEG;
- } else if (strneq(opt, "lzw", 3)) {
- char* cp = strchr(opt, ':');
- if (cp)
- predictor = atoi(cp+1);
- compression = COMPRESSION_LZW;
- } else if (strneq(opt, "zip", 3)) {
- char* cp = strchr(opt, ':');
- if (cp)
- predictor = atoi(cp+1);
- compression = COMPRESSION_DEFLATE;
- } else
- return (0);
- return (1);
- }
-
- char* stuff[] = {
- "usage: ppm2tiff [options] input.ppm output.tif",
- "where options are:",
- " -r # make each strip have no more than # rows",
- " -R # set x&y resolution (dpi)",
- "",
- " -c jpeg[:opts] compress output with JPEG encoding",
- " -c lzw[:opts] compress output with Lempel-Ziv & Welch encoding",
- " -c zip[:opts] compress output with deflate encoding",
- " -c packbits compress output with packbits encoding",
- " -c none use no compression algorithm on output",
- "",
- "JPEG options:",
- " # set compression quality level (0-100, default 75)",
- " r output color image as RGB rather than YCbCr",
- "LZW and deflate options:",
- " # set predictor value",
- "For example, -c lzw:2 to get LZW-encoded data with horizontal differencing",
- NULL
- };
-
- static void
- usage(void)
- {
- char buf[BUFSIZ];
- int i;
-
- setbuf(stderr, buf);
- for (i = 0; stuff[i] != NULL; i++)
- fprintf(stderr, "%s\n", stuff[i]);
- exit(-1);
- }
-